30. Phellópterus Nutt.; Coult. & Rose, Contr. U. S. Nat. Herb. 7: 166

1900.

Perennial, nearly or quite acaulescent herbs, with 1-3-pinnate leaves, their segments small, short and broad, the flowers white or purple. Calyx-teeth distinct. Fruit glabrous, ovate to orbicular, each carpel with 3-5 broad thin wings. Stylopodium none. Oil-tubes 2 or 3 in each interval, 4-8 on the commissural side. [Greek, referring to the broad wings of the fruit.]

About 5 species, natives of the central and western United States, the following typical.